Pump



Oct. 26 1926.

- J. BRENZINGER PUMP Filed Dec. 11, 1925 www Patented ct.. 2b, 393@ aarscenni- CAL ENGXNEERNG CORPORATEON, F BRDGEPORT, CONNECTICUT, l GRPOBA:

TXON 0F CONNECTICUT.

PUMP.

Application 'tiled December 11, 1925. serial No. 'Mt

rlhis invention relates to pumps ol the type in which a rather exactquantity ot fluid, such as the viscous material used tor artificialsilk, is delivered, and the main object and features of the invention isto provide means whereby the wear ot the parts can be compensated tor soas to retain the ability to deliver a measured quantity of lluid.

ln the accompanying drawings the invention is disclosed in a concreteand preferred form in which:

Fig. 1 is a general view in side elevation, showing a pump embodying theinvention.

Fig. 2 is a vertical sectional view substantially on the plane of line2-2 ot Fig. 1.

Fig. 3 is a vertical sectional view substantially on the plane of line3--3 of Fig. 2.

Fig. 4 is a sectional view substantially on the plane ot line 4.1 ofFig. 3.

Fig. 5 is a perspective view of the ller members used in the device.

ln the art as heretofore practiced it has been customary to use twoexternal spur gears or pinions meshing with each other teeth of thepinions produces a leakage be- I tween the teeth ot the gears at thepoint where they mesh thus affecting adversely the measuringr quality ofthe pump or lts capacity to deliver a given amount with each revolution.

using as the pump elements one internal and one external gear meshingwith each other as l tind that by this construction means can be readilyprovided to press the gears into closer engagement to compensate 4forwear, and also it is more dilieult for the material to work back betweenthe teeth ot the gears because more teeth are in mesh than in aconstruction involving the use ot two external gears.

1 indicates a ca-sing of any suitable construction but here convenientlycomposed ot two members 2 and 3 bolted together as at lland havinginterposed between them a plate t. having a circular cut-away portion Gthat constitutes the pump chamber., l and indicate respectively an inletand an outlet to and 'from said chamber. Seated within the cut-away ntion i annular. 9 having internal r rllhis defect l' overcome byl in thepresent instance, this annulus is simply a loose ring guided by thewalls ct the pump chamber. 10 is an external gear or pinion alsocontained within the pum chamber and meshing with the interna gear. Gearl0 is mounted on a shaft 11, driven 'froman suitable source, in such away that a slig it diametral motion is possible, this boing indicated bythe double line at 12. 13 and 142 are segmental shaped and taper fillermembers secured to member 2 by means ot set screws 15 and occupy thespace between the unmeshed parts of the gears.

It will now be understood that rotation imparted to shaft 11 Will causegear 10 to imparta travelingl motion to the annulus and that materialentering from inlet 7 will be carried around on both sides of the lillermembers or guides 13 and 14 in the spaces of the unmeshed parts oftheteeth of both gears and `will thence be delivered to outlet 8. ShouldYnow the gear teeth become Worn it will be understood that the fillermembers or guides can be adjusted by reason ot slots 16 to bring thegears more closely together to thereby prevent flow of fluid between themeshed parts of the teeth of the gears.

I claim:

1. A pump including: a casing having an inlet and an outlet, and pumpingelements embracing: an internal gear rotatable in said casing, and anexternal pinion, mounted to-have a slight diametral motion, alsorotatable within said casing and meshing with the internal gear; andfiller means to take up the wear 'ot the gears by pressing them vintocloser engagement with each other. 2. A pump including: a casing havingan inlet and an outlet, and pumping elements embracing: an internalVgear. rotatable in said casing, and an external pinion, mounted to havea slight diametral motion, also rotatable Within said casing and meshingwith the internal gear, and adjustable segmental shaped liller memberswithin the casing and between the unmeshed arts ot the gears to take upthe wear ot tne gears by pressing them. inte closer engagement withether.

3. A pump including: a casing having a circularshaped pump chamberprovided with l inlet, segmental guides chamber, annu- Il thin the lushaving 'internal teeth loosely mounted Within the pump chamber andsurrounding the guides, an external gear mounted to have a slightdiametral play', Within the chamber between the guides and the annulusand in mesh with the internal teeth of the latter, and means foradjusting the guides to bring the gear into closer engageu ment with theannulus.

4. A pump including: a casing having a circular-shaped pump chamberprovided with an outlet and an inlet, segmental taper guides within thepump chamber, an an- Lene-,eea

nulus having internal teeth loosely mounted Within the pump chamber andsurrounding the guides, an external gear mounted to have a slightdiametral play, Withinv the chamber between the guides and the annulusand in mesh with the internal teeth of the latter, and means foradjusting the guides to bring the gear into closer' engagement with thennulus.

Signed at Bridgeport in the county of Fairfield and State of Connecticutthis 9th day of December, 1925

